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首页> 外文期刊>Coordination chemistry reviews >Inorganic molecular sieves: Preparation, modification and industrial application in catalytic processes
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Inorganic molecular sieves: Preparation, modification and industrial application in catalytic processes

机译：无机分子筛：催化过程的制备，改性及工业应用

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摘要

The increasing environmental concern and promotion of "green processes" are forcing the substitution of traditional acid and base homogeneous catalysts by solid ones. Among these heterogeneous catalysts, zeolites and zeotypes can be considered as real "green" catalysts, due to their benign nature from an environmental point of view. The importance of these inorganic molecular sieves within the field of heterogeneous catalysis relies not only on their microporous structure and the related shape selectivity, but also on the flexibility of their chemical composition. Modification of the zeolite framework composition results in materials with acidic, basic or redox properties, whereas multifunctional catalysts can be obtained by introducing metals by ion exchange or impregnation procedures, that can catalyze hydrogenation-dehydrogenation reactions, and the number of commercial applications of zeolite based catalysts is continuously expanding. In this review we discuss determinant issues for the development of zeolite based catalysts, going from zeolite catalyst preparation up to their industrial application. Concerning the synthesis of microporous materials we present some of the new trends moving into larger pore structures or into organic free synthesis media procedures, thanks to the incorporation of novel organic templates or alternative framework elements, and to the use of high-throughput synthesis methods. Post-synthesis zeolite modification and final catalyst conformation for industrial use are briefly discussed. In a last section we give a thorough overview on the application of zeolites in industrial processes. Some of them are well established mature technologies, such as fluid catalytic cracking, hydrocracking or aromat-ics alkylation. Although the number of zeolite structures commercially used as heterogeneous catalysts in these fields is limited, the development of new catalysts is a continuous challenge due to the need for processing heavier feeds or for increasing the quality of the products. The application of zeolite based catalysts in the production of chemicals and fine chemicals is an emerging field, and will greatly depend on the discovery of new or known structures by alternative, lower cost, synthesis routes, and the fine tuning of their textural properties. Finally, biomass conversion and selective catalytic reduction for conversion of NOx are two active research fields, highlighting the interest in these potential industrial applications.
机译：日益增长的环境关注和“绿色工艺”的推广正迫使用固体催化剂代替传统的酸和碱均相催化剂。在这些非均相催化剂中，由于从环境的角度来看它们是良性的，因此沸石和沸石型可被认为是真正的“绿色”催化剂。这些无机分子筛在非均相催化领域的重要性不仅取决于它们的微孔结构和相关的形状选择性，还取决于它们的化学组成的灵活性。沸石骨架组成的改性导致材料具有酸性，碱性或氧化还原特性，而多功能催化剂可通过离子交换或浸渍程序引入金属来获得，该催化剂可催化加氢-脱氢反应，以及基于沸石的商业应用数量催化剂正在不断扩大。在这篇综述中，我们讨论了从沸石催化剂制备到工业应用的沸石基催化剂开发的决定性问题。关于微孔材料的合成，由于结合了新颖的有机模板或替代性框架元素，以及使用了高通量合成方法，我们提出了一些进入更大的孔结构或进入无有机合成介质程序的新趋势。简要讨论了合成后的沸石改性和最终催化剂的工业用途。在最后一节中，我们对沸石在工业过程中的应用进行了全面的概述。其中一些是成熟的成熟技术，例如流化催化裂化，加氢裂化或芳烃烷基化。尽管在这些领域中商业上用作非均相催化剂的沸石结构的数量受到限制，但是由于需要加工较重的进料或提高产品质量，新型催化剂的开发一直是一个挑战。沸石基催化剂在化学品和精细化学品生产中的应用是一个新兴的领域，并且将极大地取决于通过替代，低成本，合成路线以及对它们的结构性质的精细调节来发现新的或已知的结构。最后，生物质转化和用于NOx转化的选择性催化还原是两个活跃的研究领域，突出了对这些潜在工业应用的兴趣。

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  • 来源
    《Coordination chemistry reviews》 |2011年第14期|p.1558-1580|共23页
  • 作者

    Cristina Martínez; Avelino Corma;

  • 作者单位

    Institute de Tecnología Química (UPV-CSIC), Universidad Politécnica de Valencia, Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s, 46022 Valencia, Spain;

    Institute de Tecnología Química (UPV-CSIC), Universidad Politécnica de Valencia, Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s, 46022 Valencia, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    zeolites; inorganic molecular sieves; catalysis; heterogeneous catalysts; catalytic industrial processes;

    机译：分子筛;无机分子筛;催化;非均相催化剂;催化工业过程;

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